Appendix talk:Dark Type/@comment-31954725-20170707192922/@comment-31267872-20170806154539

(Shouldn't the Pokémon keep the item in wild battles?)

Well, if the wild battles thing still works, switch to Covet. Thief is more well-known probably (because I mean, well it's called Thief) but you have much limited access to Thief without the TM (currently unobtainable in PBB). Covet works exactly the same but more Pokémon are able to learn it through level-up. Eevee learns it at Level 1, so if you can make Eevee eggs, you can get Pokémon with Covet.